Cistern or tank for the transport and storing of different liquids



May 16, 1961 Filed Aug. 19, 1957 S. WADENBY CISTERN OR TANK FOR THE TRANSPORT AND STORING OF DIFFERENT LIQUIDS 5 Sheets-Sheet 1 May 16, 1961 s. WADE-INBY 2,984,392

CISTERN OR TANK FOR THE TRANSPORT AND STORING OF DIFFERENT LIQUIDS Filed Aug. 19, 1957 5 Sheets-Sheet 2 FIG.2

May 16, 1961 s. WADENBY 2,984,392

CISTERN OR TANK FOR THE TRANSPORT AND STORING OF DIFFERENT LIQUIDS Filed Aug. 19, 1957 5 Sheets-Sheet 3 FIG.3

S. WADENBY TANK FOR THE '1 May 16, 1961 CISTERN OR RANSPORT AND STORING OF DIFFERENT LIQUIDS 5 Sheets-Sheet 4 Filed Aug. 19, 1957 May 16, 1961 s. WADENBY 2,984,392

CISTERN OR TANK FOR THE TRANSPORT AND STORING OF DIFFERENT LIQUIDS Filed Aug. 19, 1957 5 Sheets-Sheet 5 United States Patent Ofice Patented May 16, 1961 CISTERN OR TANK FOR THE TRANSPORT AND STORING OF DIFFERENT LIQUIDS Svenake Wadenby, Falkenherg, Sweden, assignor to Chr. Olsson I Falkenherg AB, Falkenherg, Sweden Filed Aug. 19, 1957, Ser. No. 678,968

Claims priority, application Sweden Aug. 22, 1956 2 Claims. (Cl. ZZZ-386.5)

The present invention relates to a cistern or tank for transportation or storing of different liquids, preferably built in the form of a railway carriage cistern with a cistern divided into more compartments by means of partition walls, with a substantially cylindrical envelope surface and two end walls, and a partition wall provided in the cistern or in each compartment, which partition wall by its edges is attached to the cistern along the plane of intersection between the envelope surface and the end walls of the cistern and an imaginary plane passing through the cistern parallel to or including the longitudinal axis thereof, which diaphragm divides the cistern 'into two chambers.

According to the invention the partition wall comprising a single or double flexible diaphragm of substantially the same size and form as that part of the envelope surface and the end walls of the cistern that is located at one or the other side of the said plane of intersection, besides which each of the said chambers is provided with a special filling device, a special emptying device and a special manhole for inspection and the like.

The invention is illustrated by means of several embodiments in the accompanying drawings.

Fig. 1 is a lateral view of a railway carriage cistern according to the invention. Fig. 2 is a corresponding end view. Fig. 3 is a section along the line IIIIII in Fig. 1. Fig. 4 is a lateral view of another embodiment of the invention. Fig. 5 is a section along the line V-V in Fig. 4. Fig. 6 is a cross section corresponding to Fig. 3 of another embodiment.

Referring to the drawing 1 designates a horizontallyarranged cistern with cylindrical wall 2 and somewhat vaulted end walls 3, the said cistern being arranged on a chassis 4 provided with wheels.

In each cistern 1 a flexible diaphragm 5 of a material resistive to gases and liquids is provided, which is sealingly attached at its ends to the cistern wall 2 and to the end walls 3 by means of clamping lists or the like 7, which are arranged along the line of intersection between the vertical plane through the central axis of the cistern 1 and the wall and end walls 3 of the cistern, the said diaphragm having substantially the same size and form as that part of the envelope surface and the end walls of the cistern that is located at one or the other side of the said vertical plane, so that the cistern is divided into two chambers 8 and 9 entirely separated from each other.

Each of the said chambers 8, 9 is provided with a special filling device 10 and 10 respectively, and a special emptying device 11 and 11 respectively. Each of the said chambers 8, 9 is also provided with special manholes 12 and 12 respectively for inspection and the like.

The cistern need not be cylindrical, if only the surface of the mantle and the end Walls is such that the flexible diaphragm can be made so that its surface will have substantially the same size and form as the inner wall of the cistern at each side of the diaphragm. The diaphragm may also be arranged in such a manner that its edges to be attached lie along a plane which forms an angle, 0-90, with the vertical plane, but otherwise analogous with that described above.

In the embodiment according to Fig. 6 the diaphragm 5 is attached along the line of intersection between the wall of the cistern 1 and an imagined plane which is parallel with a plane passing through the central axis of the cistern, and the diaphragm has substantially the same size and form as the inner wall of the cistern below a plane which may be imagined to pass through the at tachment device of the diaphragm.

However, the diaphragm may suitably be arranged so that, when one chamber or both chambers at both sides of the diaphragm are filled with liquid, the centre of gravity of the liquid is moved along a vertical line through the centre of gravity of the cistern or substantially along the said line, deviations laterally being only brought about through the specific weight of the diaphragm.

Instead of a single diaphragm a double or manifold diaphragm may suitably be arranged, the different layers of which are of a material that is particularly resistive to certain gases or liquids.

In the embodiment shown in Figs. 4 and 5 the cistern is divided into four compartments 13, 14, 15, and 16 by pairs of arched partition walls 17, the convex surfaces of which face each other and form end walls for the cistern compartments. In each compartment 13-16 a double flexible diaphragm 18, 19 is provided which with its edges is attached with sealing to the envelope surface 2 respectively partition Walls 17 and end walls 3 by means of clamping lists 7, which go along the line of intersection between the vertical plane through the central axis of the cistern 1 and the walls 17 and 3 respectively, the said diaphragm having substantially the same size and form as that part of the respective mantle and end walls lying at one side respectively the other side of the said vertical plane.

At the top and at the bottom of the partition walls 17 there are provided one or more openings 20 and 21 respectively at each side of the diaphragm 18, 19, so that gas and liquid respectively can pass between all the spaces of the cistern compartments on both sides of the diaphragm. In order to prevent gas or liquid from flowing out to or expand to the spaces 22 located between the converging surfaces of the walls 17, sealing plates 23 are provided round the openings 20 and 21.

What I claim is:

1. A cistern for the storage and transportation of two dissimilar fluids comprising at least one casing having a cylindrical mantle and two outwardly arched end walls, a flexible diaphragm longitudinally arranged within said casing and dividing said easing into two longitudinal chambers, and sealing means totally located within said casing securing the peripheral edge of said diaphragm to the mantle and end walls of said casing in approximate contact therewith in a plane parallel to a plane extending longitudinally through the central axis of said casing and inclined with respect to a vertical plane through said axis, said casing having at the upper portion thereof filling means for each of said chambers, emptying means at the lower portion of said casing for automatically discharging by gravity the contents of each of said chambers, and inspection manhole means for each of said chambers, said diaphragm being adapted to be deformed against a portion of the inner wall of the casing by the contents of one of the chambers.

2. Apparatus for the storage and transportation of two dissimilar fluids comprising a pair of horizontal casings contiguously arranged colinearly end to end, each of said said casingin approximate contact therewith in a plane parallel with the longitudinal axis of said casing, the sealing means of each of saidcasings being substantially coplanar; the adjacent end walls of said pair of casings each having diametrically oppositely arranged openings therein on each side of said diaphragms, and sealing plates intermediate said adjacent end walls and surrounding each opening in the end wall of'one casing and the corresponding opening in the adjacent end wall of the other casing to provide communication between the first and second chambers of one casing and the first and second chambers, respectively, of the other casing, one

of said casings having at the upper portion thereof separate filling means for said first and second chambers, and

one of said casings having at the lower portion thereof emptying means for automatically separately discharging by gravity the contents of said first and second chambers.

References Cited in the file of this patent UNITED STATES PATENTS 788,893 Dupuis May 2, 1905 1,050,889 White Jan. 21, 1913 1,608,225 Mauran Nov. 23, 1926 2,097,985 Maryott Nov. 2, 1937 2,108,416 Smith et al. Feb. 15, 1978 2,387,598 Mercier Oct. 23, 1945 2,621,719 Eaton et a1. Dec. 16, 1952 2,758,747 Stevens Aug. 14, 1956 2,879,785 Vesterdal et a1 Mar. 31, 1959 

